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Ray Set visibility: public dc41c49 9h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "dl4746a",
  "title": "DL4746A",
  "brief": "LGE Zener Diodes, MELF. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "extractor-text"
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  "component": {
    "mpn": "DL4746A",
    "manufacturer": "LGE",
    "package": "MELF",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/87de004ea0905e693811dc066dbfd396.pdf",
    "parts": {
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      "lbr": "dl4746a.lbr",
      "model_3d_plain": "dl4746a.glb"
    },
    "distributor_links": {
      "lcsc": "C841112"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:18:03Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "K",
        "type": "passive",
        "description": "Cathode, marked by the cathode band on the MELF glass case; the zener diode is reverse-biased at this terminal for voltage regulation (DL4746A: VZ 18 V nominal at 14 mA test current, ±5% tolerance)."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode terminal of the MELF zener diode, opposite the cathode band; power dissipation up to 1.0 W at Tamb 50 °C with forward voltage max 1.2 V at IF=200 mA."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet shows only a MELF outline with a cathode band and no numbered pins; pin numbers 1 (cathode"
        ],
        "pages_sent": 3,
        "cost_usd": 0.0349,
        "at": "2026-10-22T21:17:54"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/87de004ea0905e693811dc066dbfd396.pdf",
        "pages": 3,
        "sha256": "a224b6085d68189f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 2,
        "described": 2,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "dl4746a.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.8,
          2.2,
          2.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3b1fa81e2e3ea0ef2e0ddbeb3f62b354a14174610250e6069a5076959a63f835",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "LGE",
      "Package": "MELF",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "a224b6085d68189f0cd5853857bbc790b512c09ec4987e8cde410ac98da919d4",
      "rows": [
        {
          "name": "Zener voltage tolerance (suffix A)",
          "symbol": "VZ",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "suffix A",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Forward voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "IF=200mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient",
          "symbol": "RThJA",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": null,
          "max": 170,
          "conditions": "l=9.5mm (3/8\"), TL=constant",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "PDiss",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Tamb 50",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Ts",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Maximum dynamic impedance",
          "symbol": "ZZT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "@IZT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum dynamic impedance (knee)",
          "symbol": "ZZK",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 750,
          "conditions": "@IZK=0.25 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum reverse leakage current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VR=13.7 V, Tamb=25",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum regulator current",
          "symbol": "IZM",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "Tamb=50",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Max surge current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "8.3ms",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Nominal zener voltage",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 18,
          "max": null,
          "conditions": "@IZT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Test current",
          "symbol": "IZT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 14,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
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  "discovery_triggers": [
    "dl4746a"
  ],
  "discovery_pitch": "DL4746A (LGE) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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    "dl4746a.lbr",
    "docs/hero.png",
    "docs/dl4746a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "dl4746a-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}